HistEQ node
This documentation is for version 2.0 of HistEQ (net.sf.cimg.CImgHistEQ).
Description
Equalize histogram of brightness values.
Uses the ‘equalize’ function from the CImg library on the ‘V’ channel of the HSV decomposition of the image.
CImg is a free, open-source library distributed under the CeCILL-C (close to the GNU LGPL) or CeCILL (compatible with the GNU GPL) licenses. It can be used in commercial applications (see http://cimg.eu).
Inputs
Input |
Description |
Optional |
|---|---|---|
Source |
No |
|
Mask |
Yes |
Controls
Parameter / script name |
Type |
Default |
Function |
|---|---|---|---|
NbLevels / |
Integer |
4096 |
Number of histogram levels used for the equalization. |
(Un)premult / |
Boolean |
Off |
Divide the image by the alpha channel before processing, and re-multiply it afterwards. Use if the input images are premultiplied. |
Invert Mask / |
Boolean |
Off |
When checked, the effect is fully applied where the mask is 0. |
Mix / |
Double |
1 |
Mix factor between the original and the transformed image. |